I got back from a trip to Spain in the brand-new 2025 Porsche 911 Carrera GTS coupé. Unfortunately, I won’t be able to share my thoughts until July 9 (check back then for the full analysis). But I can tell you something funny right now: the new 911 will be a little less aerodynamic in the US than it will be in other countries. What’s the reason? It’s kind of like safety. One person from Porsche Cars North America said that the 911 Carrera GTS Coupe has a coefficient of drag of 0.27 in Europe and other places. For American cars, the number is 0.29 because the rear spoiler doesn’t have an Eco mode setting because of rules about how well the brake lights can be seen. A back wing that moves based “primarily on speed, but also on charge-air temperature” comes standard on the 911 GTS. If the wing is in its most slippery position, it’s likely blocking the third brake light. This is against the NHTSA’s Federal Motor Vehicle Safety Standards (FMVSS), and you could get a 0.02 Cd fine. It’s important to remember that a Cd of 0.27 or 0.29 doesn’t make a big difference. Popular Mechanics says that the same car can have Cd differences of up to 5% based on the wind tunnel and the way it was tested. Still, it’s not nothing. For instance, the Tesla Model S is said to have a Cd of 0.24, while the Porsche Taycan Turbo is said to have a Cd of 0.22. With a Cd of 0.20, the Mercedes-Benz EQS, which looks like a jellybean, does better than both of them. Automobile companies are proud of how well their outside designs work, especially when they’re selling electric vehicles with longer and longer ranges. Note that the Porsche 911 GTS’s aerodynamic qualities are different in the US than they are in the rest of the world. This was also the case with the previous GTS. Porsche official told Invoice Pricing, “This hasn’t changed anything about the car before.” He also said that the Eco Mode spoiler setting wasn’t available on the previous model (992.1) in our area. Many people don’t know that interesting fact, though, so there you have it. If you want to own Porsche’s most efficient 911 GTS, consider leaving the country. You could also wait for the active back wing to be unlocked.
